Physical uplink control channel (pucch) resource allocation (ra) for a hybrid automatic retransmission re-quest-acknowledge (harq-ack) transmission

ABSTRACT

A user equipment (UE) is disclosed. The UE can identify a downlink control channel. The UE can determine when the downlink control channel is an enhanced physical downlink control channel (EPDCCH). The UE can select an enhanced physical uplink control channel (PUCCH) resource allocation for a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK) transmission when the downlink control channel is the EPDCCH.

RELATED APPLICATIONS

The present application is a continuation of U.S. patent applicationSer. No. 14/927,099, filed Oct. 29, 2015, with an attorney docket numberof P56337USC2, which is a continuation of U.S. patent application Ser.No. 14/555,317, filed Nov. 26, 2014, with an attorney docket number ofP56337USC, which is a continuation of U.S. patent application Ser. No.14/125,325, filed Dec. 11, 2013, with an attorney docket number ofP56337US, which is a national stage application of International PatentApplication No. PCT/US2013/048348 filed on Jun. 27, 2013, which claimsthe benefit of U.S. Provisional Patent Application Ser. No. 61/719,241,filed Oct. 26, 2012, with an attorney docket number of P50328Z, all ofwhich are hereby incorporated by reference in their entirety.

BACKGROUND

Wireless mobile communication technology uses various standards andprotocols to transmit data between a node (e.g., a transmission station)and a wireless device (e.g., a mobile device). Some wireless devicescommunicate using orthogonal frequency-division multiple access (OFDMA)in a downlink (DL) transmission and single carrier frequency divisionmultiple access (SC-FDMA) in an uplink (UL) transmission. Standards andprotocols that use orthogonal frequency-division multiplexing (OFDM) forsignal transmission include the third generation partnership project(3GPP) long term evolution (LTE), the Institute of Electrical andElectronics Engineers (IEEE) 802.16 standard (e.g., 802.16e, 802.16m),which is commonly known to industry groups as WiMAX (Worldwideinteroperability for Microwave Access), and the IEEE 802.11 standard,which is commonly known to industry groups as WiFi.

In 3GPP radio access network (RAN) LTE systems, the node can be acombination of Evolved Universal Terrestrial Radio Access Network(E-UTRAN) Node Bs (also commonly denoted as evolved Node Bs, enhancedNode Bs, eNodeBs, or eNBs) and Radio Network Controllers (RNCs), whichcommunicates with the wireless device, known as a user equipment (UE).The downlink (DL) transmission can be a communication from the node(e.g., eNodeB) to the wireless device (e.g., UE), and the uplink (UL)transmission can be a communication from the wireless device to thenode.

In LTE, data can be transmitted from the eNodeB to the UE via a physicaldownlink shared channel (PDSCH). A physical uplink control channel(PUCCH) can be used to acknowledge that data was received. Downlink anduplink channels or transmissions can use time-division duplexing (TDD)or frequency-division duplexing (FDD). Time-division duplexing (TDD) isan application of time-division multiplexing (TDM) to separate downlinkand uplink signals. In TDD, downlink signals and uplink signals may becarried on a same carrier frequency (i.e., shared carrier frequency)where the downlink signals use a different time interval from the uplinksignals, so the downlink signals and the uplink signals do not generateinterference for each other. TDM is a type of digital multiplexing inwhich two or more bit streams or signals, such as a downlink or uplink,are transferred apparently simultaneously as sub-channels in onecommunication channel, but are physically transmitted on differentresources. In frequency-division duplexing (FDD), an uplink transmissionand a downlink transmission can operate using different frequencycarriers (i.e. separate carrier frequency for each transmissiondirection). In FDD, interference can be avoided because the downlinksignals use a different frequency carrier from the uplink signals.

BRIEF DESCRIPTION OF THE DRAWINGS

Features and advantages of the disclosure will be apparent from thedetailed description which follows, taken in conjunction with theaccompanying drawings, which together illustrate, by way of example,features of the disclosure; and, wherein:

FIG. 1 illustrates a diagram of radio frame resources (e.g., a resourcegrid) including a legacy physical downlink control channel (PDCCH) inaccordance with an example;

FIG. 2 illustrates a diagram of various component carrier (CC)bandwidths in accordance with an example;

FIG. 3 illustrates a block diagram of uplink radio frame resources(e.g., a resource grid) in accordance with an example;

FIG. 4 illustrates a block diagram of physical uplink control channel(PUCCH) regions for long term evolution (LTE) in accordance with anexample;

FIG. 5 illustrates a block diagram of block-interleaved mapping forphysical uplink control channel (PUCCH) resource (e.g., hybrid automaticretransmission re-quest-acknowledge (HARQ-ACK)) in time division duplex(TDD) in accordance with an example;

FIG. 6 (i.e., Table 4) illustrates a table of a physical uplink controlchannel (PUCCH) resource value according to acknowledgement(ACK)/negative ACK (ACK/NACK) Resource Indicator (ARI) for downlinksemi-persistent scheduling (SPS) (i.e., 3GPP LTE standard Release 11Technical Specification (TS) 36.213 Table 9.2-2) in accordance with anexample;

FIG. 7 (i.e., Table 5) illustrates a table of a physical uplink controlchannel (PUCCH) resource value for hybrid automatic retransmissionre-quest-acknowledge (HARQ-ACK) resource for PUCCH (i.e., 3GPP LTEstandard Release 11 Technical Specification (TS) 36.213 Table10.1.2.2.1-2) in accordance with an example;

FIG. 8 (i.e., Table 6) illustrates a table of a transmission of hybridautomatic repeat request-acknowledgement (HARQ-ACK) multiplexing for A=2(i.e., 3GPP LTE standard Release 11 Technical Specification (TS) 36.213Table 10.1.3.2-1) in accordance with an example;

FIG. 9 (i.e., Table 7) illustrates a table of a transmission of hybridautomatic repeat request-acknowledgement (HARQ-ACK) multiplexing for A=3(i.e., 3GPP LTE standard Release 11 Technical Specification (TS) 36.213Table 10.1.3.2-2) in accordance with an example;

FIG. 10 (i.e., Table 8) illustrates a table of a transmission of hybridautomatic repeat request-acknowledgement (HARQ-ACK) multiplexing for A=4(i.e., 3GPP LTE standard Release 11 Technical Specification (TS) 36.213Table 10.1.3.2-3) in accordance with an example;

FIG. 11 (i.e., Table 9) illustrates a table for mapping of transportblocks (TB) and serving cell to HARQ-ACK(j) for physical uplink controlchannel (PUCCH) format 1b hybrid automatic repeatrequest-acknowledgement (HARQ-ACK) channel selection (i.e., 3GPP LTEstandard Release 11 Technical Specification (TS) 36.213 Table10.1.2.2.1-1) in accordance with an example;

FIG. 12 (i.e., Table 10) illustrates a table for mapping of subframes oneach serving cell to HARQ-ACK(j) for physical uplink control channel(PUCCH) format 1b hybrid automatic repeat request-acknowledgement(HARQ-ACK) channel selection for time division duplex (TDD) with abundling window size of M=2 (i.e., 3GPP LTE standard Release 11Technical Specification (TS) 36.213 Table 10.1.3.2-4) in accordance withan example;

FIG. 13 depicts a flow chart of a method for conditional hybridautomatic retransmission re-quest (HARQ) mapping for carrier aggregation(CA) at a user equipment (UE) in accordance with an example;

FIG. 14 depicts functionality of computer circuitry of a user equipment(UE) operable to provide conditional hybrid automatic retransmissionre-quest-acknowledge (HARQ-ACK) states mapping for carrier aggregation(CA) in accordance with an example;

FIG. 15 illustrates a block diagram of a serving node, a coordinationnode, and wireless device (e.g., UE) in accordance with an example; and

FIG. 16 illustrates a diagram of a wireless device (e.g., UE) inaccordance with an example.

Reference will now be made to the exemplary embodiments illustrated, andspecific language will be used herein to describe the same. It willnevertheless be understood that no limitation of the scope of theinvention is thereby intended.

DETAILED DESCRIPTION

Before the present invention is disclosed and described, it is to beunderstood that this invention is not limited to the particularstructures, process steps, or materials disclosed herein, but isextended to equivalents thereof as would be recognized by thoseordinarily skilled in the relevant arts. It should also be understoodthat terminology employed herein is used for the purpose of describingparticular examples only and is not intended to be limiting. The samereference numerals in different drawings represent the same element.Numbers provided in flow charts and processes are provided for clarityin illustrating steps and operations and do not necessarily indicate aparticular order or sequence.

Example Embodiments

An initial overview of technology embodiments is provided below and thenspecific technology embodiments are described in further detail later.This initial summary is intended to aid readers in understanding thetechnology more quickly but is not intended to identify key features oressential features of the technology nor is it intended to limit thescope of the claimed subject matter.

The communication of data on the physical downlink shared channel(PDSCH) can be controlled via a control channel, referred to as aphysical downlink control channel (PDCCH). The PDCCH can be used fordownlink (DL) and uplink (UL) resource assignments, transmit powercommands, and paging indicators. The PDSCH scheduling grant can bedesignated to a particular wireless device (e.g., UE) for dedicatedPDSCH resource allocation to carry UE-specific traffic, or the PDSCHscheduling grant can be designated to all wireless devices in the cellfor common PDSCH resource allocation to carry broadcast controlinformation such as system information or paging.

In one example, the PDCCH and PDSCH can represent elements of a radioframe structure transmitted on the physical (PHY) layer in a downlinktransmission between a node (e.g., eNodeB) and the wireless device(e.g., UE) using a generic 3GPP long term evolution (LTE) framestructure, as illustrated in FIG. 1.

FIG. 1 illustrates a downlink radio frame structure type 2. In theexample, a radio frame 100 of a signal used to transmit the data can beconfigured to have a duration, Tf, of 10 milliseconds (ms). Each radioframe can be segmented or divided into ten subframes 110 i that are each1 ms long. Each subframe can be further subdivided into two slots 120 aand 120 b, each with a duration, Tslot, of 0.5 ms. The first slot (#0)120 a can include a legacy physical downlink control channel (PDCCH) 160and/or a physical downlink shared channel (PDSCH) 166, and the secondslot (#1) 120 b can include data transmitted using the PDSCH.

Each slot for a component carrier (CC) used by the node and the wirelessdevice can include multiple resource blocks (RBs) 130 a, 130 b, 130 i,130 m, and 130 n based on the CC frequency bandwidth. The CC can have acarrier frequency having a bandwidth and center frequency. Each subframeof the CC can include downlink control information (DCI) found in thelegacy PDCCH. The legacy PDCCH in the control region can include one tothree columns of the first OFDM symbols in each subframe or RB, when alegacy PDCCH is used. The remaining 11 to 13 OFDM symbols (or 14 OFDMsymbols, when legacy PDCCH is not used) in the subframe may be allocatedto the PDSCH for data (for short or normal cyclic prefix).

The control region can include physical control format indicator channel(PCFICH), physical hybrid automatic repeat request (hybrid-ARQ)indicator channel (PHICH), and the PDCCH. The control region has aflexible control design to avoid unnecessary overhead. The number ofOFDM symbols in the control region used for the PDCCH can be determinedby the control channel format indicator (CFI) transmitted in thephysical control format indicator channel (PCFICH). The PCFICH can belocated in the first OFDM symbol of each subframe. The PCFICH and PHICHcan have priority over the PDCCH, so the PCFICH and PHICH are scheduledprior to the PDCCH.

Each RB (physical RB or PRB) 130 i can include 12-15 kHz subcarriers 136(on the frequency axis) and 6 or 7 orthogonal frequency-divisionmultiplexing (OFDM) symbols 132 (on the time axis) per slot. The RB canuse seven OFDM symbols if a short or normal cyclic prefix is employed.The RB can use six OFDM symbols if an extended cyclic prefix is used.The resource block can be mapped to 84 resource elements (REs) 140 iusing short or normal cyclic prefixing, or the resource block can bemapped to 72 REs (not shown) using extended cyclic prefixing. The RE canbe a unit of one OFDM symbol 142 by one subcarrier (i.e., 15 kHz) 146.

Each RE can transmit two bits 150 a and 150 b of information in the caseof quadrature phase-shift keying (QPSK) modulation. Other types ofmodulation may be used, such as 16 quadrature amplitude modulation (QAM)or 64 QAM to transmit a greater number of bits in each RE, or bi-phaseshift keying (BPSK) modulation to transmit a lesser number of bits (asingle bit) in each RE. The RB can be configured for a downlinktransmission from the eNodeB to the UE, or the RB can be configured foran uplink transmission from the UE to the eNodeB.

Each wireless device may use at least one bandwidth. The bandwidth maybe referred to as a signal bandwidth, carrier bandwidth, or componentcarrier (CC) bandwidth, as illustrated in FIG. 2. For example, the LTECC bandwidths can include: 1.4 MHz 310, 3 MHz 312, 5 MHz 314, 10 MHz316, 15 MHz 318, and 20 MHz 320. The 1.4 MHz CC can include 6 RBscomprising 72 subcarriers. The 3 MHz CC can include 15 RBs comprising180 subcarriers. The 5 MHz CC can include 25 RBs comprising 300subcarriers. The 10 MHz CC can include 50 RBs comprising 600subcarriers. The 15 MHz CC can include 75 RBs comprising 900subcarriers. The 20 MHz CC can include 100 RBs comprising 1200subcarriers.

For each UE, a CC can be defined as a primary cell (PCell). DifferentUEs may not necessarily use a same CC as their PCell. The PCell can beregarded as an anchor carrier for the UE and the PCell can thus be usedfor control signaling functionalities, such as radio link failuremonitoring, hybrid automatic repeat request-acknowledgement (HARQ-ACK),and physical uplink control channel (PUCCH) resource allocations (RA).If more than one CC is configured for a UE, the additional CCs can bedenoted as secondary cells (SCells) for the UE.

The data carried on the PDCCH can be referred to as downlink controlinformation (DCI). Multiple wireless devices can be scheduled in onesubframe of a radio frame.

Therefore, multiple DCI messages can be sent using multiple PDCCHs. TheDCI information in a PDCCH can be transmitted using one or more controlchannel elements (CCE). A CCE can be comprised of a group of resourceelement groups (REGs). A legacy CCE can include up to nine REGs. Eachlegacy REG can be comprised of four resource elements (REs). Eachresource element can include two bits of information when quadraturemodulation is used. Therefore, a legacy CCE can include up to 72 bits ofinformation. When more than 72 bits of information are needed to conveythe DCI message, multiple CCEs can be employed. The use of multiple CCEscan be referred to as an aggregation level. In one example, theaggregation levels can be defined as 1, 2, 4 or 8 consecutive CCEsallocated to one legacy PDCCH.

The legacy PDCCH can create limitations to advances made in other areasof wireless communication. For example, mapping of CCEs to subframes inOFDM symbols can typically be spread over the control region to providefrequency diversity. However, no beam forming diversity may be possiblewith the current mapping procedures of the PDCCH. Moreover, the capacityof the legacy PDCCH may not be sufficient for advanced controlsignaling.

To overcome the limitations of the legacy PDCCH, an enhanced PDCCH(EPDCCH) can use the REs in an entire PRB or PRB pair (where a PRB paircan be two contiguous PRBs using the same subcarrier's subframe),instead of just the first one to three columns of OFDM symbols in afirst slot PRB in a subframe as in the legacy PDCCH. Accordingly, theEPDCCH can be configured with increased capacity to allow advances inthe design of cellular networks and to minimize currently knownchallenges and limitations.

Unlike the legacy PDCCH, the EPDCCH can be mapped to the same REs orregion in a PRB as the PDSCH, but in different PRBs. In an example, thePDSCH and the EPDCCH may not be multiplexed within a same PRB (or a samePRB pair). Thus if one PRB (or one PRB pair) contains an EPDCCH, theunused REs in the PRB (or PRB pair) may be blanked, since the REs maynot be used for the PDSCH.

For Long Term Evolution (LTE) time division duplex (TDD) system, twotypes of downlink control channels (e.g., PDCCH and EPDCCH) may coexistwithin a certain bundling window. A PUCCH resource allocation method canbe defined when the bundling window uses both the PDCCH and the EPDCCH.

Referring back to FIG. 2, a component carrier can be used to carrychannel information via a radio frame structure transmitted on thephysical (PHY) layer in a uplink transmission between a node (e.g.,eNodeB) and the wireless device (e.g., UE) using a generic long termevolution (LTE) frame structure, as illustrated in FIG. 3. While an LTEframe structure is illustrated, a frame structure for another type ofcommunication standard using SC-FDMA or OFDMA may also be used.

FIG. 3 illustrates an uplink radio frame structure. A similar structurecan be used for a downlink radio frame structure using OFDMA, asillustrated FIG. 1. In the example shown in FIG. 3, a radio frame 100 ofa signal used to transmit control information or data can be configuredto have a duration, T_(f), of 10 milliseconds (ms). Each radio frame canbe segmented or divided into ten subframes 110 i that are each 1 mslong. Each subframe can be further subdivided into two slots 120 a and120 b, each with a duration, T_(slot), of 0.5 ms. Each slot for acomponent carrier (CC) used by the wireless device and the node caninclude multiple resource blocks (RBs) 330 a, 330 b, 330 i, 330 m, and330 n based on the CC frequency bandwidth. Each RB (physical RB or PRB)330 i can include 12-15 kHz subcarriers 336 (on the frequency axis) and6 or 7 SC-FDMA symbols 332 (on the time axis) per subcarrier. The RB canuse seven SC-FDMA symbols if a short or normal cyclic prefix isemployed. The RB can use six SC-FDMA symbols if an extended cyclicprefix is used. The resource block can be mapped to 84 resource elements(REs) 140 i using short or normal cyclic prefixing, or the resourceblock can be mapped to 72 REs (not shown) using extended cyclicprefixing. The RE can be a unit of one SC-FDMA symbol 342 by onesubcarrier (i.e., 15 kHz) 146. Each RE can transmit two bits 150 a and150 b of information in the case of quadrature phase-shift keying (QPSK)modulation. Other types of modulation may be used, such as 16 quadratureamplitude modulation (QAM) or 64 QAM to transmit a greater number ofbits in each RE, or bi-phase shift keying (BPSK) modulation to transmita lesser number of bits (a single bit) in each RE. The RB can beconfigured for an uplink transmission from the wireless device to thenode.

An uplink signal or channel can include data on a Physical Uplink SharedCHannel (PUSCH) or control information on a Physical Uplink ControlCHannel (PUCCH). In LTE, the uplink physical channel (PUCCH) carryinguplink control information (UCI) can include channel state information(CSI) reports, Hybrid Automatic Retransmission reQuest (HARQ)ACKnowledgment/Negative ACKnowledgment (ACK/NACK) and uplink schedulingrequests (SR).

The wireless device (e.g., UE) can provide HARQ-ACK feedback for a PDSCHusing a PUCCH. The PUCCH can support multiple formats (i.e., PUCCHformat) with various modulation and coding schemes (MCS), as shown forLTE in Table 1. Similar information to Table 1 can be shown in 3GPP LTEstandard Release 11 (e.g., V11.2.0 (2013-02)) Technical Specification(TS) 36.211 Table 5.4-1. For example, PUCCH format 1b can be used toconvey a two-bit HARQ-ACK, which can be used for carrier aggregation.References to tables (e.g., mapping tables) in the 3GPP LTE Release 11may also be found in 3GPP LTE Releases 8, 9, and 10.

TABLE 1 PUCCH Modulation Number of bits per format scheme subframe,M_(bit) 1 N/A N/A 1a BPSK 1 1b QPSK 2 2 QPSK 20 2a QPSK + BPSK 21 2bQPSK + QPSK 22 3 QPSK 48

Legacy LTE TDD can support asymmetric UL-DL allocations by providingseven different semi-statically configured uplink-downlinkconfigurations. Table 2 illustrates seven UL-DL configurations used inLTE, where “D” represents a downlink subframe, “S” represents a specialsubframe, and “U” represents an uplink subframe. In an example, thespecial subframe can operate or be treated as a downlink subframe.Similar information to Table 2 can be shown in 3GPP LTE TS 36.211 Table4.2-2.

TABLE 2 Uplink-downlink Subframe number configuration 0 1 2 3 4 5 6 7 89 0 D S U U U D S U U U 1 D S U U D D S U U D 2 D S U D D D S U D D 3 DS U U U D D D D D 4 D S U U D D D D D D 5 D S U D D D D D D D 6 D S U UU D S U U D

As illustrated by Table 2, UL-DL configuration 0 can include 6 uplinksubframes in subframes 2, 3, 4, 7, 8, and 9, and 4 downlink and specialsubframes in subframes 0, 1, 5, and 6; and UL-DL configuration 5 caninclude one uplink subframe in subframe 2, and 9 downlink and specialsubframes in subframes 0, 1, and 3-9. Each uplink subframe n can beassociated with a downlink subframe based on the uplink-downlinkconfiguration, where each uplink subframe n can have a downlinkassociation set index Kε{k₀, k₁, . . . k_(M-1)} where M is defined asthe number of elements in set K, as illustrated by Table 3. Similarinformation to Table 3 can be shown in 3GPP LTE TS 36.213 Table10.1.3.1-1.

TABLE 3 UL-DL Subframe n Configuration 0 1 2 3 4 5 6 7 8 9 0 — — 6 — 4 —— 6 — 4 1 — — 7, 6 4 — — — 7, 6 4 — 2 — — 8, 7, 4, 6 — — — — 8, 7, 4, 6— — 3 — — 7, 6, 11 6, 5 5, 4 — — — — — 4 — — 12, 8, 7, 11 6, 5, 4, 7 — —— — — — 5 — — 13, 12, 9, 8, 7, 5, 4, 11, 6 — — — — — — — 6 — — 7 7 5 — —7 7 —

The Table 3 shows examples of downlink subframe bundling in an uplinksubframe handling ACK/NACK feedback for certain downlink subframe(s).For example, in uplink-downlink configuration 4, uplink subframe 2(subframe n) handles ACK/NACK feedback for downlink and specialsubframes which are {12, 8, 7, 11} subframes (subframes k_(m)) earlierthan uplink subframe 2 (i.e., downlink and special subframes {0, 4, 5,1} (or downlink and special subframes n-k_(m))) and M equals 4. Uplinksubframe 3 (subframe n) handles ACK/NACK feedback for downlink subframeswhich are {6, 5, 4, 7} subframes (subframes k_(m)) earlier than uplinksubframe 3 (i.e., downlink subframes {7, 8, 9, 6} (or downlink subframesn-k_(m))) and M equals 4. For uplink-downlink configuration 5 uplinksubframe 2, M equals 9. For uplink-downlink configuration 0, uplinksubframe 2, M equals one, and uplink subframe 3, M equals zero.Depending on the uplink-downlink configuration one uplink subframe maybe responsible for ACK/NACK feedback for one or multiple downlinksubframes. In certain situations, even distribution between uplinksubframe responsibility can be desired to reduce situations where oneuplink subframe is responsible for ACK/NACK feedback for a large numberof downlink and special subframes.

As an underlying requirement in some examples, cells of the network canchange UL-DL (TDD) configurations synchronously in order to avoid theinterference. The legacy LTE TDD set of configurations can provide DLsubframe allocations in the range between 40% and 90%, as shown in Table2. The UL and DL subframes allocation within a radio frame can bereconfigured through system information broadcast signaling (e.g.,system information block [SIB]). Hence, the UL-DL allocation onceconfigured can be expected to vary semi-statically.

A property of TDD is that a number of UL and DL subframes can bedifferent as shown in Table 2 and often the number of DL subframes canbe more than the number of UL subframes for a radio frame. Inconfigurations where more DL subframes are used than UL subframes,multiple DL subframes can be associated with one single UL subframe forthe transmission of a corresponding control signals. Aconfiguration-specific HARQ-ACK timing relationship can be defined(e.g., 3GPP LTE standard Release 11 (e.g., V11.2.0 (2013-02)) TS 36.213Table 10.1.3.1-1 or Table 3). If a UE is scheduled in a multiple of DLsubframes, which can be associated with one UL subframe, the UE cantransmit multiple ACK/NAK (ACK/NACK) bits in that UL subframe. A numberof DL subframes with HARQ-ACK feedback on one single UL subframe cancomprise one bundling window.

FIG. 4 illustrates a PUCCH resource allocation and usage with legacyPDCCH for TDD. Only the first slot is expanded or elaborated since thesecond slot can have symmetry by slot-level hopping for the PUCCH. ThePRBs for PUCCH format 2/2a/2b can be located from a band-edge PRB toN_(RB) ⁽²⁾, which can be configured by higher layer signaling (e.g.,radio resource control (RRC) signaling). If a mixed PRB for PUCCH format2/2a/2b and PUCCH format 1/1a/1b exists, the mixed PRB can be configuredby N_(cs) ⁽¹⁾, where one PRB may be available for the mixed PRB.Following the mixed PRB, the PRBs for PUCCH format 1/1a/1bsemi-statically configured by RRC signaling can be located. Startingfrom N_(PUCCH) ⁽¹⁾, the PRBs for PUCCH format 1a/1b by lowest CCE indexbased dynamic resource allocation can exist and can be located. ThePUSCH can be also transmitted in the dynamic PUCCH resource regionaccording to scheduling policies. Any PRBs can be located for PUCCHformat 3 by RRC signaling. In another example the PRBs for PUCCH format3 can be transmitted inside of bands like other PUCCH formats.

For instance, for TDD HARQ-ACK bundling or TDD HARQ-ACK multiplexing forone configured serving cell and a subframe n with M=1 where M is thenumber of elements in the set K defined in Table 3, the UE can use PUCCHresource n_(PUCCH) ^((1,{tilde over (p)})) for transmission of HARQ-ACKin subframe n for {tilde over (p)} mapped to antenna port p for PUCCHformat 1a/1b. If a PDSCH transmission is indicated by the detection ofcorresponding PDCCH or a PDCCH indicates a downlink semi-persistentscheduling (SPS) release within subframe(s) n-k, where kεK and K(defined in Table 3) is a set of M elements {k₀, k₁, . . . k_(M-1)}depending on the subframe n and the UL-DL configuration (defined inTable 2), the UE can first select a c value out of {0, 1, 2, 3} whichmakes N_(c)≦n_(CCE)<N_(c+1) and can use n_(PUCCH) ^((1,{tilde over (p)})⁰ ⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾ for antenna port p₀,where N_(PUCCH) ⁽¹⁾ is configured by higher layers (e.g., RRCsignaling), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, andn_(CCE) is the number of the first CCE used for transmission of thecorresponding PDCCH in subframe n-k_(m) and the corresponding m, wherek_(m) is the smallest value in set K such that UE detects a PDCCH insubframe n-k_(m). When a two antenna port transmission is configured forPUCCH format 1a/1b, the PUCCH resource for HARQ-ACK bundling for antennaport p₁ can be given by n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+1+N_(PUCCH) ⁽¹⁾.

For example, for TDD, the PUCCH resources for each DL subframe can bereserved exclusively, as much as possible, and the number of reservedresources for each DL subframe can be similar to each other by applyingblock interleaved mapping, as illustrated in FIG. 5. By reserving thePUCCH resources for each DL subframe, PUSCH resource can be efficientlyscheduled for the DL subframes within a bundling window. The PUCCHresource for HARQ-ACK in TDD can also be determined by a function of thelowest CCE index of the scheduling PDCCH.

As for EPDCCH, the subframes can be configured for monitoring EPDCCH byhigher layer signaling. Therefore, within a certain bundling window, twotypes of downlink control channels of PDCCH and EPDCCH may coexist. Forexample, for a UE assuming M=4, DL subframe m=0 and 2 can be used forPDCCH while m=1 and 3 can be used for EPDCCH according to a higher layerconfiguration, as shown in FIG. 4. As a result, a PUCCH resourceallocation method providing for the PDCCH and the EPDCCH can be definedwhen the bundling window uses both the PDCCH and the EPDCCH.

For example, two different types of DL control channels (i.e., PDCCH andEPDCCH) can coexist within a bundling window. A mechanism can be used tohandle PUCCH resource allocation on mixed DL subframes with PDCCH andEPDCCH within a bundling window for TDD. In a configuration, the UE canfollow a resource allocation method for the DL subframe derived for anactual transmitted PUCCH resource (e.g., either PDCCH or EPDCCH). Inanother configuration, the UE can follow a legacy PDCCH rule (e.g., basethe resource allocation on the transmitted PUCCH resource (i.e., methodA)). In another configuration, the UE can follow an EPDCCH rule (e.g.,base the resource allocation on the transmitted EPUCCH resource (i.e.,method B)).

As used herein, a bundling window for a UE where the PDCCH and theEPDCCH can coexist is referred to as “mixed bundling window,” unlessotherwise stated. A method of dynamic PUCCH resource allocation in mixedbundling window for TDD is disclosed.

A dynamic PUCCH resource allocation method (e.g., method A)corresponding to legacy PDCCH (e.g., sometimes referred to as a PDCCH)can be defined for TDD. A dynamic PUCCH resource allocation method(e.g., method B) corresponding to EPDCCH can also be defined for TDD.For instance, the PUCCH resource allocation between Method A and MethodB can be determined by the actually used PUCCH resource (e.g., n_(PUCCH)⁽¹⁾ or n_(PUCCH,j) ⁽¹⁾) derived by the DL subframe.

For example, if the actually used PUCCH resource is derived by DLsubframe configured for EPDCCH, Method B may be used as the PUCCHresource allocation. If the actually PUCCH resource is derived by DLsubframe not configured for EPDCCH (e.g., configured for PDCCH), MethodA may be used as the PUCCH resource allocation. For example on HARQ-ACKmultiplexing (i.e., PUCCH format 1b with channel selection), if a UEuses PUCCH resource n_(PUCCH,j) ⁽¹⁾ for transmitting HARQ-ACK feedbackand the PUCCH resource is derived by m=j within a bundling window, thePUCCH resource allocation method can be applied between Method A and Bbased on whether the DL subframe m for PUCCH resource derivation isconfigured for PDCCH or configured for EPDCCH.

As for dynamic PUCCH resource allocation of TDD in a single configuredcell, the PUCCH format 1a/1b transmissions and PUCCH format 1b withchannel selection (i.e., HARQ-ACK multiplexing) support implicitresource allocation determined by n_(CCE) (e.g., a lowest CCE index ofthe PDCCH) or n_(ECCE) (e.g., a lowest ECCE index of EPDCCH). For bothPUCCH format 1a/1b and PUCCH format 1b with channel selection, thenumber of actual transmitted PUCCH resources may be one CCE. The usedPUCCH resource can be determined either by the corresponding DL subframeor by a DL downlink assignment index (DAI) value within a bundlingwindow. A downlink assignment index (DAI) can be a field in the downlinkresource grant signaled to a wireless device (e.g., UE), indicating howmany subframes in a previous time window contained transmissions to thatwireless device. DAI can be applicable in time domain duplex (TDD) mode,and can enable the wireless device to determine whether wireless devicehas received all the downlink subframes or transport blocks for whichthe wireless device transmits a combined ACK/NACK.

In an example, the PUCCH resource allocation equation for TDD withEPDCCH can be represented as n_(PUCCH) ^((1,{tilde over (p)}) ⁰⁾=n_(ECCE)+Value where n_(ECCE) can be the lowest ECCE index number andValue can consists of various parameters. As an example,Value=ARI+AP+(m+1)·N_(PUCCH) ^((1,k)) where ACK/NACK Resource Indictor(ARI) is an offset value (e.g., maybe integer value) which may be givenfrom the DCI in EPDCCH, AP is antenna port (0, . . . , 3), m is theparameter based on Table 3, and N_(PUCCH) ^((1,k)) is the UE specificstarting offset value for EPDCCH set k. In another example, an ACK/NACKResource Offset (ARO) can be substituted for ARI.

In a configuration, for TDD HARQ-ACK bundling or TDD HARQ-ACKmultiplexing for one configured serving cell and a subframe n with M=1where M is the number of elements in the set K defined in Table 3, theUE can use PUCCH resource n_(PUCCH) ^((1,{tilde over (p)})) fortransmission of HARQ-ACK in subframe n for {tilde over (p)} mapped toantenna port p for PUCCH format 1a/1b.

If there is PDSCH transmission indicated by the detection ofcorresponding PDCCH/EPDCCH or there is PDCCH/EPDCCH indicating downlinkSPS release within subframe(s) n-k, where kεK and K (defined in Table 3)is a set of M elements {k₀, k₁, . . . , k_(M-1)} depending on thesubframe n and the UL-DL configuration, and if the subframe n-k_(m) isnot configured for EPDCCH, the UE can first select a c value out of {0,1, 2, 3} which makes N_(c)≦n_(CCE)<N_(c+1) and can use n_(PUCCH)^((1,{tilde over (p)}) ⁰ ⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾for antenna port p₀, where N_(PUCCH) ⁽¹⁾ is configured by higher layers,N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, and n_(CCE) is thenumber of the first CCE used for transmission of the corresponding PDCCHin subframe n-k_(m) and the corresponding m, where k_(m) is the smallestvalue in set K such that UE detects a PDCCH in subframe n-k_(m) (i.e.,the last DL subframe where the PDCCH is detected within a bundlingwindow). When two antenna port transmission is configured for PUCCHformat 1a/1b, the PUCCH resource for HARQ-ACK bundling for antenna portp₁ can be given by n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾.

If there is PDSCH transmission indicated by the detection ofcorresponding PDCCH/EPDCCH or there is PDCCH/EPDCCH indicating downlinkSPS release within subframe(s) n-k, where kεK and K (defined in Table 3)is a set of M elements {k₀, k₁, . . . , k_(M-1)} depending on thesubframe n and the UL-DL configuration, and if the subframe n-k_(m) isconfigured for EPDCCH, the UE can use n_(PUCCH) ^((1,{tilde over (p)}) ⁰⁾=n_(ECCE)+Value for antenna port p₀ and n_(ECCE) is the number of thefirst ECCE used for transmission of the corresponding EPDCCH for theEPDCCH set {tilde over (k)} in subframe n-k_(m) and the corresponding m,where k_(m) is the smallest value in set K such that UE detects a EPDCCHfor the EPDCCH set {tilde over (k)} in subframe n-k_(m) (i.e., the lastDL subframe where the EPDCCH is detected within a bundling window). Whentwo antenna port transmission is configured for PUCCH format 1a/1b, thePUCCH resource for HARQ-ACK bundling for antenna port p₁ can be given byn_(PUCCH) ^((1,{tilde over (p)}) ¹ ⁾=n_(ECCE)+Value+1.

If there is only a PDSCH transmission where there is not a correspondingPDCCH/EPDCCH detected within subframe(s) n-k, where kεK and K is definedin Table 3, the UE can use PUCCH format 1a/1b and PUCCH resourcen_(PUCCH) ^((1,{tilde over (p)})) with the value of n_(PUCCH)^((1,{tilde over (p)})) is determined according to higher layerconfiguration and Table 4 (i.e., FIG. 6). For a UE configured for twoantenna port transmission for PUCCH format 1a/1b and HARQ-ACK bundling,a PUCCH resource value in Table 4 maps to two PUCCH resources with thefirst PUCCH resource n_(PUCCH) ^((1,{tilde over (p)}) ⁰ ⁾ for antennaport p₀ and the second PUCCH resource n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾ for antenna port p₁, otherwise, the PUCCH resource value maps to asingle PUCCH resource n_(PUCCH) ^((1,{tilde over (p)}) ⁰ ⁾ for antennaport p₀.

Therefore, for HARQ-ACK bundling or HARQ-ACK multiplexing with M=1without carrier aggregation (CA), the PUCCH resource used can be derivedfrom a last DL subframe within a bundling window depending on whetherthe DL subframe is configured by PDCCH or EPDCCH.

In another configuration, for TDD HARQ-ACK multiplexing and sub-frame nwith M>1 and one configured serving cell, where M is the number ofelements in the set K defined in Table 3, denote n_(PUCCH,i) ⁽¹⁾ as thePUCCH resource derived from sub-frame n-k_(i) and HARQ-ACK(i) as theACK/negative ACK/discontinuous transmission (DTX) response (i.e.,ACK/NACK/DTX) from sub-frame n-k_(i), where k_(i)εK (defined in Table 3)and 0≦i≦M−1.

For a PDSCH transmission indicated by the detection of correspondingPDCCH/EPDCCH or a PDCCH/EPDCCH indicating downlink SPS release insub-frame n-k_(i) where k_(i)εK, and if the subframe n-k_(i) is notconfigured for EPDCCH, the PUCCH resource can be represented byn_(PUCCH,i) ⁽¹⁾=(M−I−1)·N_(c)+i·N_(c+1)+n_(CCE,i)+N_(PUCCH) ⁽¹⁾, where cis selected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,i)<N_(c+1),N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, n_(CCE,i) is thenumber of the first CCE used for transmission of the corresponding PDCCHin subframe n-k_(i), and N_(PUCCH) ⁽¹⁾ is configured by higher layers.

For a PDSCH transmission indicated by the detection of correspondingPDCCH/EPDCCH or a PDCCH/EPDCCH indicating downlink SPS release insub-frame n-k_(i) where k_(i)εK, and if the subframe n-k_(i) isconfigured for EPDCCH, the PUCCH resource n_(PUCCH,i)⁽¹⁾=n_(ECCE,i)+Value, n_(ECCE,i) is the number of the first ECCE usedfor transmission of the corresponding EPDCCH for the EPDCCH set {tildeover (k)} in subframe n-k_(i).

For a PDSCH transmission where there is not a corresponding PDCCH/EPDCCHdetected in subframe n-k_(i), the value of n_(PUCCH,i) ⁽¹⁾ can bedetermined according to higher layer configuration and Table 4 (i.e.,FIG. 6).

In another configuration, for TDD HARQ-ACK multiplexing with PUCCHformat 1b with channel selection and two configured serving cells and asubframe n with M≦2 where M is the number of elements in the set Kdefined in Table 3, the UE can transmit b(0)b(1) (e.g., constellationbits) on PUCCH resource N_(PUCCH) ⁽¹⁾ selected from A PUCCH resources,n_(PUCCH,j) ⁽¹⁾ where 0≦j≦A−1 and Aε{2, 3, 4}, according to Table 6(i.e., FIG. 8), Table 7 (i.e., FIG. 9), and Table 8 (i.e., FIG. 10) insubframe n using PUCCH format 1b. For a subframe n with M=1, HARQ-ACK(j)denotes the ACK/NACK/DTX response for a transport block or SPS releasePDCCH associated with serving cell, where the transport block andserving cell for HARQ-ACK(j) and A PUCCH resources are given by Table 9(i.e., FIG. 11). For a subframe n with M=2, HARQ-ACK(j) denotes theACK/NACK/DTX response for a PDSCH transmission or SPS release PDCCHwithin subframe(s) given by set K on each serving cell, where thesubframes on each serving cell for HARQ-ACK(j) and A PUCCH resources aregiven by Table 10 (i.e., FIG. 12). The UE can determine the A PUCCHresources, n_(PUCCH,j) ⁽¹⁾ associated with HARQ-ACK(j) where 0≦j≦A−1 inTable 9 (i.e., FIG. 11) for M=1 and Table 10 (i.e., FIG. 12) for M=2,according to the following:

For a PDSCH transmission indicated by the detection of a correspondingPDCCH/EPDCCH in subframe n-k_(m), where k_(m)εK on a primary cell, orfor a PDCCH/EPDCCH indicating downlink SPS release in subframe n-k_(m),where k_(m)εK on the primary cell, and if the subframe n-k_(m) is notconfigured for EPDCCH, the PUCCH resource can be represented byn_(PUCCH,j) ⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where cis selected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)≦N_(c+1),N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘} where N isdetermined from the primary cell, and for a subframe n with M=1 and atransmission mode that supports up to two transport blocks on theserving cell where the corresponding PDSCH transmission occurs, thePUCCH resource n_(PUCCH,j+1) ⁽¹⁾ is given by n_(PUCCH,j+1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+1+N_(PUCCH) ⁽¹⁾ where n_(CCE,m) isthe number of the first CCE used for transmission of a corresponding DCIassignment and N_(PUCCH) ⁽¹⁾ is configured by higher layers.

For a PDSCH transmission indicated by the detection of a correspondingPDCCH/EPDCCH in subframe n-k_(m), where k_(m)εK on a primary cell, orfor a PDCCH/EPDCCH indicating downlink SPS release in subframe n-k_(m),where k_(m)εK on the primary cell, and if the subframe n-k_(m) isconfigured for EPDCCH, the PUCCH resource can be represented byn_(PUCCH,j) ⁽¹⁾=n_(ECCE,m)+Value and for a subframe n with M=1 and atransmission mode that supports up to two transport blocks on theserving cell where the corresponding PDSCH transmission occurs, thePUCCH resource n_(PUCCH,j+1) ⁽¹⁾ is given by n_(PUCCH,j+1)⁽¹⁾=n_(ECCE,m)+Value+1 where n_(ECCE,m) is the number of the first CCEused for transmission of a corresponding DCI assignment by EPDCCH forthe EPDCCH set {tilde over (k)}.

For a PDSCH transmission on the primary cell where there is not acorresponding PDCCH/EPDCCH detected within subframe(s) n-k, where kεK,the value of n_(PUCCH,j) ⁽¹⁾ can be determined according to higher layerconfiguration and Table 4 (i.e., FIG. 6).

In another configuration, for TDD HARQ-ACK multiplexing with PUCCHformat 1b with channel selection and sub-frame n with M>2 and twoconfigured serving cells, where M is the number of elements in the set Kdefined in Table 3, denotes n_(PUCCH,i) ⁽¹⁾ as the PUCCH resourcederived from the transmissions in M DL sub-frames associated with the ULsubframe n, where 0≦i≦3. n_(PUCCH,0) ⁽¹⁾ and n_(PUCCH,1) ⁽¹⁾ areassociated with the PDSCH transmission(s) or a PDCCH indicating downlinkSPS release on the primary cell and n_(PUCCH,2) ⁽¹⁾ and n_(PUCCH,3) ⁽¹⁾are associated with the PDSCH transmission(s) on the secondary cell.

For a primary cell, if there is a PDSCH transmission on the primary cellwithout a corresponding PDCCH/EPDCCH detected within the subframe(s)n-k, where kεK, the value of n_(PUCCH,0) ⁽¹⁾ can be determined accordingto higher layer configuration and Table 5 (i.e., FIG. 7).

If there is a PDSCH transmission on the primary cell without acorresponding PDCCH/EPDCCH detected within the subframe(s) n-k, wherekεK, for a PDSCH transmission on the primary cell indicated by thedetection of a corresponding PDCCH/EPDCCH in subframe n-k_(m), wherek_(m)εK with the DAI value in the PDCCH/EPDCCH equal to ‘1’ or a PDCCHindicating downlink SPS release in subframe n-k_(m), where k_(m)εK withthe DAI value in the PDCCH/EPDCCH equal to ‘1’, and if the subframen-k_(m) is not configured for EPDCCH, the PUCCH resource n_(PUCCH,1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾ where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1),N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, where n_(CCE,m) isthe number of the first CCE used for transmission of the correspondingPDCCH for the EPDCCH set {tilde over (k)} in subframe n-k_(m) andN_(PUCCH) ⁽¹⁾ is configured by higher layers.

If there is a PDSCH transmission on the primary cell without acorresponding PDCCH/EPDCCH detected within the subframe(s) n-k, wherekεK, for a PDSCH transmission on the primary cell indicated by thedetection of a corresponding PDCCH/EPDCCH in subframe n-k_(m), wherek_(m)εK with the DAI value in the PDCCH/EPDCCH equal to ‘1’ or a PDCCHindicating downlink SPS release in subframe n-k_(m), where k_(m)εK withthe DAI value in the PDCCH/EPDCCH equal to ‘1’, and if the subframen-k_(m) is configured for EPDCCH, the PUCCH resource n_(PUCCH,1)⁽¹⁾=n_(ECCE,m)+Value where n_(ECCE,m) is the number of the first ECCEused for transmission of the corresponding EPDCCH for the EPDCCH set{tilde over (k)} in subframe n-k_(m).

If there is a PDSCH transmission on the primary cell without acorresponding PDCCH/EPDCCH detected within the subframe(s) n-k, wherekεK, HARQ-ACK(0) can be the ACK/NACK/DTX response for the PDSCHtransmission without a corresponding PDCCH/EPDCCH. For 0≦j≦M−1, if aPDSCH transmission with a corresponding PDCCH/EPDCCH and DAI value inthe PDCCH/EPDCCH equal to ‘j’ or a PDCCH/EPDCCH indicating downlink SPSrelease and with DAI value in the PDCCH/EPDCCH equal to ‘j’ is received,HARQ-ACK(j) can be the corresponding ACK/NACK/DTX response; otherwiseHARQ-ACK(j) can be set to DTX.

Otherwise (e.g., if there is a PDSCH transmission on the primary cellwith a corresponding PDCCH/EPDCCH detected within the subframe(s) n-k,where kεK), for a PDSCH transmission on the primary cell indicated bythe detection of a corresponding PDCCH/EPDCCH in subframe n-k_(m), wherek_(m)εK with the DAI value in the PDCCH/EPDCCH equal to either ‘1’ or‘2’ or a PDCCH/EPDCCH indicating downlink SPS release in subframen-k_(m), where k_(m)εK with the DAI value in the PDCCH/EPDCCH equal toeither ‘1’ or ‘2’, and if the subframe n-k_(m) is not configured forEPDCCH, the PUCCH resource n_(PUCCH,i)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1),N_(c)=max{0,└[N·(N_(sc) ^(RB)·c−4)]/36┘}, where n_(CCE,m) is the numberof the first CCE used for transmission of the corresponding PDCCH insubframe n-k_(m), N_(PUCCH) ⁽¹⁾ is configured by higher layers, i=0 forthe corresponding PDCCH with the DAI value equal to ‘1’ and i=1 for thecorresponding PDCCH with the DAI value equal to ‘2’.

Otherwise (e.g., if there is a PDSCH transmission on the primary cellwith a corresponding PDCCH/EPDCCH detected within the subframe(s) n-k,where kεK), for a PDSCH transmission on the primary cell indicated bythe detection of a corresponding PDCCH/EPDCCH in subframe n-k_(m), wherek_(m)εK with the DAI value in the PDCCH/EPDCCH equal to either ‘1’ or‘2’ or a PDCCH/EPDCCH indicating downlink SPS release in subframen-k_(m), where k_(m)εK with the DAI value in the PDCCH/EPDCCH equal toeither ‘1’ or ‘2’, and if the subframe n-k_(m) is configured for EPDCCH,the PUCCH resource n_(PUCCH,i) ⁽¹⁾=n_(ECCE,m)+Value where n_(CCE,m) isthe number of the first ECCE used for transmission of the correspondingEPDCCH for the EPDCCH set {tilde over (k)}₀ in subframe n-k_(m) i=0 forthe corresponding EPDCCH with the DAI value equal to ‘1’ and i=1 for thecorresponding EPDCCH for the EPDCCH set {tilde over (k)}₁ with the DAIvalue equal to ‘2’.

Otherwise (e.g., if there is a PDSCH transmission on the primary cellwith a corresponding PDCCH/EPDCCH detected within the subframe(s) n-k,where kεK), for 0≦j≦M−1, if a PDSCH transmission with a correspondingPDCCH/EPDCCH and DAI value in the PDCCH/EPDCCH equal to ‘j+1’ or aPDCCH/EPDCCH indicating downlink SPS release and with DAI value in thePDCCH/EPDCCH equal to ‘j+1’ is received, HARQ-ACK(j) is thecorresponding ACK/NACK/DTX response; otherwise HARQ-ACK(j) can be set toDTX.

A secondary cell may not transmit an EPDCCH, so PUCCH resourceallocation may use a legacy PDCCH rule for a secondary cell.

In another example, if only PDCCHs are within a bundling window, thelegacy PUCCH resource allocation method can be used. If only EPDCCHs arewithin a bundling window, a PUCCH resource allocation method associatedwith EPDCCH can be used. If at least one EPDCCH is within a bundlingwindow, either the legacy PUCCH resource allocation method can be used,or a PUCCH resource allocation associated with EPDCCH can be used, aspreviously described.

The same principles illustrated for the case of PUCCH format 1a/1b orPUCCH format 1b with channel selection can be applicable when PUCCHformat 3 is configured (e.g., a primary cell fall-back case).

Another example provides a method 500 for conditional time divisionduplex (TDD) physical uplink control channel (PUCCH) resource allocationfor a hybrid automatic retransmission re-quest-acknowledge (HARQ-ACK)transmission in a subframe n at a user equipment (UE), as shown in theflow chart in FIG. 13. The method may be executed as instructions on amachine, computer circuitry, or a processor for the UE, where theinstructions are included on at least one computer readable medium orone non-transitory machine readable storage medium. The method includesthe operation of recognizing that a downlink control channel typereceived within a prior specified subframe is a physical downlinkcontrol channel (PDCCH) or an enhanced physical downlink control channel(EPDCCH), wherein the prior specified subframe occurs in time before thesubframe n, as in block 510. The operation of determining a PUCCHresource for the HARQ-ACK transmission using a lowest control channelelement (CCE) index of a physical downlink control channel (PDCCH) whenthe downlink control channel type is the PDCCH follows, as in block 520.The next operation of the method can be determining the PUCCH resourcefor the HARQ-ACK transmission using a lowest enhanced CCE (ECCE) indexof the EPDCCH when the downlink control channel type is the EPDCCH, asin block 530.

In an example, the prior specified subframe can include a subframe n-k,where kεK, and where a downlink association set index K is defined in aTable 10.1.3.1-1 in a Third Generation Partnership Project (3GPP) LongTerm Evolution (LTE) standard Release 11 Technical Specification (TS)36.213 (e.g., Table 3), and K can include a set of M elements {k₀, k₁, .. . k_(M-1)} depending on the subframe n and an uplink/downlink (UL/DL)configuration.

In another example, the operation of determining the PUCCH resource forthe subframe n-k using a lowest enhanced CCE (ECCE) index of an EPDCCHcan further configured to determine the PUCCH resource using a parameterValue represent by Value=ARO+AP+(m+1)·N_(PUCCH) ^((1,k)) whereacknowledgement (ACK)/negative ACK (ACK/NACK) Resource Offset (ARO) isan integer offset value derived from a downlink control information(DCI) in the EPDCCH, an antenna port (AP) is parameter (0, . . . , 3), aN_(PUCCH) ^((1,k)) is a UE specific starting offset value for an EPDCCHset {tilde over (k)}, and m is an integer, where k_(m) is the smallestvalue in a set K such that the UE detects an EPDCCH for an EPDCCH set{tilde over (k)} in a subframe n-k_(m).

For one configured serving cell and the subframe n, with M=1, theoperation of determining the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) for the HARQ-ACK transmission using the lowestCCE index n_(CCE) of the PDCCH can further include selecting a c valueout of {0, 1, 2, 3} which makes N_(c)≦n_(CCE)<N_(c+1) and using thePUCCH resource n_(PUCCH) ^((1,{tilde over (p)})) represented byn_(PUCCH) ^((1,{tilde over (p)}) ⁰⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ^((1,{tilde over (p)})) forantenna port p₀ and n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+1+N_(PUCCH) ⁽¹⁾ for antenna port p₁,where n_(CCE) is a first CCE index number used for transmission of acorresponding PDCCH in subframe n-k_(m) and the corresponding m, wherek_(m) is the smallest value in set K such that UE detects a PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, Nis a downlink bandwidth configuration, expressed in units of N_(sc)^(RB), N_(sc) ^(RB) is a resource block size in the frequency domain,expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is a startingPUCCH channel index for a PUCCH region in an uplink subframe and isconfigured by high layers for each UE. The antenna port p₁ can be usedwhen two antenna port transmission is configured. The operation ofdetermining the PUCCH resource n_(PUCCH) ^((1,{tilde over (p)})) for theHARQ-ACK transmission using the lowest ECCE index n_(ECCE) of the EPDCCHcan further include using the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) represented by n_(PUCCH) ^((1,{tilde over (p)})⁰ ⁾=n_(CCE)+Value for antenna port p₀ and n_(PUCCH)^((1,{tilde over (p)}) ¹ ⁾=n_(CCE)=Value+1 for antenna port p₁, whereValue is the parameter, n_(ECCE) is the number of the first ECCE usedfor transmission of the corresponding EPDCCH for the EPDCCH set {tildeover (k)} in subframe n-k_(m) and a corresponding m, where k_(m) is thesmallest value in set K such that UE detects an EPDCCH for the EPDCCHset {tilde over (k)} in subframe n-k_(m). The antenna port p₁ can beused when two antenna port transmission is configured.

For one configured serving cell and a subframe n with M>1 where 0≦i≦M−1,the operation of determining the PUCCH resource n_(PUCCH,i) ⁽¹⁾ for theHARQ-ACK transmission using the lowest CCE index n_(CCE,i) of the PDCCHcan be represented by n_(PUCCH,j)⁽¹⁾=(M−i−1)·N_(c)+i·N_(c+1)+n_(CCE,i)+N_(PUCCH) ⁽¹⁾, where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,i)<N_(c+1), n_(CCE,i) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(i), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘},N_(RB) ^(DL) is a downlink bandwidth configuration, expressed in unitsof N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in the frequencydomain, expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is astarting PUCCH channel index for a PUCCH region in an uplink subframeand is configured by high layers for each UE. The operation ofdetermining the PUCCH resource n_(PUCCH,i) ⁽¹⁾ for the HARQ-ACKtransmission using the lowest ECCE index n_(ECCE,i) of the EPDCCH can berepresented by n_(PUCCH,i) ⁽¹⁾=n_(ECCE,i)+Value, where Value is theparameter, n_(ECCE,i) is the number of the first ECCE used fortransmission of the corresponding EPDCCH for the EPDCCH set {tilde over(k)} in subframe n-k_(i).

For at least two configured serving cells and a subframe n with M≦2where k_(m)εK on a primary cell, and 0≦j≦A−1 and Aε{2, 3, 4}, theoperation of determining the PUCCH resource n_(PUCCH,j) ⁽¹⁾ for theHARQ-ACK transmission using the lowest CCE index n_(CCE,m) of the PDCCHcan be represented by n_(PUCCH,j)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾ and n_(PUCCH,j+1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+N_(CCE,m)+1+N_(PUCCH) ⁽¹⁾, where c isselected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m)is a first CCE index number used for transmission of a correspondingPDCCH in subframe n-k_(i), N_(c)=max{0,└[N·(N_(sc) ^(RB)·c−4)]/36┘}, Nis a downlink bandwidth configuration from the primary cell, expressedin units of N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in thefrequency domain, expressed as a number of subcarriers, and N_(PUCCH)⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplinksubframe and is configured by high layers for each UE, and n_(PUCCH,j+1)⁽¹⁾ is used for a subframe n and a transmission mode that support up totwo transport block on a serving cell where a corresponding physicaldownlink shared channel (PDSCH) transmission occurs. The operation ofdetermining the PUCCH resource n_(PUCCH,j) ⁽¹⁾ for the HARQ-ACKtransmission using the lowest ECCE index n_(ECCE,m) of the EPDCCH can berepresented by n_(PUCCH,j) ⁽¹⁾=n_(ECCE,m)+Value and n_(PUCCH,j+1)⁽¹⁾=n_(ECCE,m)+Value+1, where Value is the parameter, n_(ECCE,m) is thenumber of the first ECCE used for transmission of the corresponding DCIassignment by EPDCCH for the EPDCCH set {tilde over (k)} in subframen-k_(m), and n_(PUCCH,j+1) ⁽¹⁾ is used for a subframe n and atransmission mode that support up to two transport block on a servingcell where a corresponding PDSCH transmission occurs.

For at least two configured serving cells and a subframe n with M>2where kεK, k_(m)εK for a primary cell, the operation of determining thePUCCH resource n_(PUCCH,1) ⁽¹⁾ for the HARQ-ACK transmission using thelowest CCE index n_(CCE,m) of the PDCCH can be represented byn_(PUCCH,1) ⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where cis selected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1),n_(CCE,m) is a first CCE index number used for transmission of acorresponding PDCCH in subframe n-k_(m), N_(c)=max{0,└[N_(RB)^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, N is a downlink bandwidth configurationfrom the primary cell, expressed in units of N_(sc) ^(RB), N_(sc) ^(RB)is a resource block size in the frequency domain, expressed as a numberof subcarriers, and N_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index fora PUCCH region in an uplink subframe and is configured by high layersfor each UE. The operation of determining the PUCCH resource n_(PUCCH,1)⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCE index n_(ECCE,m)of the EPDCCH can be represented by n_(PUCCH,1) ⁽¹⁾=n_(ECCE,m)+Value,where Value is the parameter, n_(ECCE,m) is the number of the first ECCEused for transmission of the corresponding EPDCCH for the EPDCCH set{tilde over (k)} in subframe n-k_(m).

Another example provides functionality 600 of computer circuitry of aprocessor on a user equipment (UE) operable to provide conditionalphysical uplink control channel (PUCCH) resource allocation in timedivision duplex (TDD) for a hybrid automatic retransmissionre-quest-acknowledge (HARQ-ACK) transmission in a subframe n, as shownin the flow chart in FIG. 14. The functionality may be implemented as amethod or the functionality may be executed as instructions on amachine, where the instructions are included on at least one computerreadable medium or one non-transitory machine readable storage medium.The computer circuitry can be configured to receive a downlink controlchannel within a prior specified subframe, wherein the prior specifiedsubframe occurs in time before the subframe n, as in block 610. Thecomputer circuitry can be further configured to recognize that adownlink control channel type received within the prior specifiedsubframe is a physical downlink control channel (PDCCH) or an enhancedphysical downlink control channel (EPDCCH), as in block 620. Thecomputer circuitry can also be configured to determine a PUCCH resourcefor the HARQ-ACK transmission using a lowest control channel element(CCE) index of the PDCCH when the received downlink control channel typeis the PDCCH, as in block 630. The computer circuitry can be furtherconfigured to determine the PUCCH resource for the HARQ-ACK transmissionusing a lowest enhanced CCE (ECCE) index of the EPDCCH when the receiveddownlink control channel type is the EPDCCH, as in block 640.

In an example, the prior specified subframe can include a subframe n-k,where kεK, and where a downlink association set index K is defined in aTable 10.1.3.1-1 in a Third Generation Partnership Project (3GPP) LongTerm Evolution (LTE) standard Release 11 Technical Specification (TS)36.213 (e.g., Table 3), and K can include a set of M elements (k₀, k₁, .. . k_(M-1)) depending on the subframe n and an uplink/downlink (UL/DL)configuration. In another example, the subframe n-k includes a PDCCH anda configured EPDCCH subframe.

In another configuration, the computer circuitry configured to determinethe PUCCH resource for the subframe n-k using the lowest ECCE index ofan EPDCCH can be further configured to determine the PUCCH resourceusing a parameter (e.g., Value). The parameter can be derived from anacknowledgement (ACK)/negative ACK (ACK/NACK) Resource Offset (ARO), anantenna port (AP), a UE specific starting offset value for an EPDCCHset, and an integer m, where a k_(m) is the smallest value in a set Ksuch that the UE detects an EPDCCH in a subframe n-k_(m).

For one configured serving cell and the subframe n, with M=1 where M isa number of elements in the set Kε{k₀, k₁, . . . k_(M-1)}, the computercircuitry configured to determine the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) for a HARQ-ACK transmission using the lowest CCEindex n_(CCE) of the PDCCH can select a C value out of {0, 1, 2, 3}which makes N_(c)≦n_(CCE)<N_(c+1) and uses the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) represented by n_(PUCCH) ^((1,{tilde over (p)})⁰ ⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾ for antenna port p₀and n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+1+N_(PUCCH) ⁽¹⁾ for antenna port p₁,where n_(CCE) is a first CCE index number used for transmission of acorresponding PDCCH in subframe n-k_(m) and the corresponding m, wherek_(m) is the smallest value in set K such that UE detects a PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, Nis a downlink bandwidth configuration, expressed in units of N_(sc)^(RB), N_(sc) ^(RB) is a resource block size in the frequency domain,expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is a startingPUCCH channel index for a PUCCH region in an uplink subframe and isconfigured by high layers for each UE. The antenna port p₁ can be usedwhen two antenna port transmission is configured. The computer circuitryconfigured to determine the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) for the HARQ-ACK transmission using the lowestECCE index n_(ECCE) of the EPDCCH can use the PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) represented by n_(PUCCH) ^((1,{tilde over (p)})⁰ ⁾=n_(ECCE)+Value for antenna port p₀ and n_(PUCCH)^((1,{tilde over (p)}) ¹ ⁾=n_(ECCE)+Value+1 for antenna port p₁, whereValue is the parameter, n_(ECCE) is the number of the first ECCE usedfor transmission of the corresponding EPDCCH for the EPDCCH set {tildeover (k)} in subframe n-k_(m) and a corresponding m, where k_(m) is thesmallest value in set K such that UE detects an EPDCCH for the EPDCCHset {tilde over (k)} in subframe n-k_(m). The antenna port p₁ can beused when two antenna port transmission is configured.

For one configured serving cell and a subframe n with M>1 where M is thenumber of elements in the set Kε{k₀, k₁, . . . k_(M-1)} and 0≦i≦M−1, thecomputer circuitry configured to determine the PUCCH resourcen_(PUCCH,i) ⁽¹⁾ for a HARQ-ACK transmission using the lowest CCE indexn_(CCE,i) can be represented by n_(PUCCH,i)⁽¹⁾=(M−i−1)·N_(c)+i·N_(c+1)+n_(CCE,i)+N_(PUCCH) ⁽¹⁾, where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,i)<N_(c+1), n_(CCE,i) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(i), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, Nis a downlink bandwidth configuration, expressed in units of N_(sc)^(RB), N_(sc) ^(RB) is a resource block size in the frequency domain,expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is a startingPUCCH channel index for a PUCCH region in an uplink subframe and isconfigured by high layers for each UE. The computer circuitry configuredto determine the PUCCH resource n_(PUCCH,i) ⁽¹⁾ for the HARQ-ACKtransmission using the lowest ECCE index n_(ECCE,i) can be representedby n_(PUCCH,i) ⁽¹⁾=n_(ECCE,i)+Value, where Value is the parameter,n_(ECCE,i) is the number of the first ECCE used for transmission of thecorresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframen-k_(i).

For at least two configured serving cells and a subframe n with M≦2where M is the number of elements in the set Kε{k₀, k₁, . . . k_(M-1)},k_(m)εK on a primary cell, and 0≦j≦A−1 and Aε{2, 3, 4}, the computercircuitry configured to determine the PUCCH resource n_(PUCCH,j) ⁽¹⁾ fora HARQ-ACK transmission using the lowest CCE index n_(CCE,m) can berepresented by n_(PUCCH,j)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾ and n_(PUCCH,j+1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+1+N_(PUCCH) ⁽¹⁾, where c isselected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m)is a first CCE index number used for transmission of a correspondingPDCCH in subframe n-k_(i), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc)^(RB)·c−4)]/36┘}, N is a downlink bandwidth configuration from theprimary cell, expressed in units of N_(sc) ^(RB), N_(sc) ^(RB) is aresource block size in the frequency domain, expressed as a number ofsubcarriers, and N_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index for aPUCCH region in an uplink subframe and is configured by high layers foreach UE, and n_(PUCCH,j+1) ⁽¹⁾ is used for a subframe n and atransmission mode that support up to two transport block on a servingcell where a corresponding physical downlink shared channel (PDSCH)transmission occurs. The computer circuitry configured to determine thePUCCH resource n_(PUCCH,j) ⁽¹⁾ for the HARQ-ACK transmission using thelowest ECCE index n_(ECCE,m) can be represented by n_(PUCCH,j)⁽¹⁾=n_(ECCE,m)+Value and n_(PUCCH,j+1) ^((1)=n) _(ECCE,m)+Value+1, whereValue is the parameter, n_(ECCE,m) is the number of the first ECCE usedfor transmission of the corresponding DCI assignment by EPDCCH for theEPDCCH set {tilde over (k)} in subframe n-k_(m), and n_(PUCCH,j+1) ⁽¹⁾is used for a subframe n and a transmission mode that support up to twotransport block on a serving cell where a corresponding PDSCHtransmission occurs.

For at least two configured serving cells and a subframe n with M>2where M is the number of elements in the set Kε{k₀, k₁, . . . k_(M-1)},kεK, k_(m)εK for a primary cell, the computer circuitry configured todetermine the PUCCH resource n_(PUCCH,1) ⁽¹⁾ for a HARQ-ACK transmissionusing the lowest CCE index n_(CCE,m) can be represented by n_(PUCCH,1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘}, Nis a downlink bandwidth configuration from the primary cell, expressedin units of N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in thefrequency domain, expressed as a number of subcarriers, and N_(PUCCH)⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplinksubframe and is configured by high layers for each UE. The computercircuitry configured to determine the PUCCH resource n_(PUCCH,1) ⁽¹⁾ forthe HARQ-ACK transmission using the lowest ECCE index n_(ECCE,m) can berepresented by n_(PUCCH,1) ⁽¹⁾=n_(CCE,m)+Value, where Value is theparameter, n_(ECCE,m) is the number of the first ECCE used fortransmission of the corresponding EPDCCH for the EPDCCH set {tilde over(k)} in subframe n-k_(m).

In another example, the computer circuitry can use the PUCCH resourcen_(PUCCH) ^(({tilde over (p)})) for the HARQ-ACK transmission in asubframe n for a {tilde over (p)} mapped to an antenna port p for aThird Generation Partnership Project (3GPP) Long Term Evolution (LTE)standard Release 11 PUCCH format 1a or 1b, or 3GPP PUCCH LTE standardRelease 11 format 1b with channel selection, or 3GPP PUCCH LTE standardRelease 11 format 3.

FIG. 15 illustrates an example node (e.g., serving node 710 andcooperation node 750) and an example wireless device 720. The node caninclude a node device 712 and 752. The node device or the node can beconfigured to communicate with the wireless device (e.g., UE). The nodedevice, device at the node, or the node can be configured to communicatewith other nodes via a backhaul link 748 (optical or wired link), suchas an X2 application protocol (X2AP). The node device can include aprocessor 714 and 754 and a transceiver 716 and 756. The transceiver canbe configured to receive a HARQ-ACK feedback in a PUCCH resource. Thetransceiver 716 and 756 can be further configured to communicate withthe coordination node via an X2 application protocol (X2AP). Theprocessor can be further configured to a reverse procedure can beimplemented for PUCCH detection as disclosed herein. The serving nodecan generate both a primary cell (PCell) and a secondary cell (SCell).The node (e.g., serving node 710 and cooperation node 750) can include abase station (BS), a Node B (NB), an evolved Node B (eNB), a basebandunit (BBU), a remote radio head (RRH), a remote radio equipment (RRE), aremote radio unit (RRU), or a central processing module (CPM).

The device (used by a node) can be configured to detect a physicaluplink control channel (PUCCH) resource allocation in time divisionduplex (TDD) for a hybrid automatic retransmission re-quest-acknowledge(HARQ-ACK) transmission in a subframe n. The transceiver 716 and 756 canbe configured to receive a PUCCH resource in a subframe n configuredwith a downlink control channel type. The processor 714 and 754 can beconfigured to: Determine when the subframe n is configured with aphysical downlink control channel (PDCCH) or an enhanced physicaldownlink control channel (EPDCCH); decode the PUCCH resource for aHARQ-ACK transmission using a lowest control channel element (CCE) indexof a physical downlink control channel (PDCCH) when the downlink controlchannel type is the PDCCH; and decode the PUCCH resource for theHARQ-ACK transmission using a lowest enhanced CCE (ECCE) index of anEPDCCH when the downlink control channel type is the EPDCCH.

In an example, the downlink control channel type can be received in asubframe n-k, where kεK, where a downlink association set index K isdefined in a Table 10.1.3.1-1 (e.g., Table 3) in a Third GenerationPartnership Project (3GPP) Long Term Evolution (LTE) standard Release 11Technical Specification (TS) 36.213, and K includes a set of M elements(k₀, k₁, . . . k_(M-1)) depending on the subframe n and auplink/downlink (UL/DL) configuration.

In another example, the processor configured to decode the PUCCHresource for the HARQ-ACK transmission using the lowest ECCE index ofthe EPDCCH can be further configured to decode the PUCCH resource usinga parameter Value represent by Value=ARO+AP+(m+1)·N_(PUCCH) ^((1,k))where acknowledgement (ACK)/negative ACK (ACK/NACK) Resource Offset(ARO) is an integer offset value derived from a downlink controlinformation (DCI) in the EPDCCH, an antenna port (AP) is parameter (0, .. . , 3), a N_(PUCCH) ^((1,k)) is a UE specific starting offset valuefor an EPDCCH set {tilde over (k)}, and m is an integer, where k_(m) isthe smallest value in a set K such that the UE detects an EPDCCH for anEPDCCH set k in subframe n-k_(m).

The wireless device 720 (e.g., UE) can include a transceiver 724 and aprocessor 722. The wireless device (i.e., device) can be configuredprovide conditional physical uplink control channel (PUCCH) resourceallocation in time division duplex (TDD) for a hybrid automaticretransmission re-quest-acknowledge (HARQ-ACK) transmission in asubframe n, as described in 500 of FIG. 13 or 600 of FIG. 14.

FIG. 16 provides an example illustration of the wireless device, such asan user equipment (UE), a mobile station (MS), a mobile wireless device,a mobile communication device, a tablet, a handset, or other type ofwireless device. The wireless device can include one or more antennasconfigured to communicate with a node or transmission station, such as abase station (BS), an evolved Node B (eNB), a baseband unit (BBU), aremote radio head (RRH), a remote radio equipment (RRE), a relay station(RS), a radio equipment (RE), a remote radio unit (RRU), a centralprocessing module (CPM), or other type of wireless wide area network(WWAN) access point. The wireless device can be configured tocommunicate using at least one wireless communication standard including3GPP LTE, WiMAX, High Speed Packet Access (HSPA), Bluetooth, and WiFi.The wireless device can communicate using separate antennas for eachwireless communication standard or shared antennas for multiple wirelesscommunication standards. The wireless device can communicate in awireless local area network (WLAN), a wireless personal area network(WPAN), and/or a WWAN.

FIG. 16 also provides an illustration of a microphone and one or morespeakers that can be used for audio input and output from the wirelessdevice. The display screen may be a liquid crystal display (LCD) screen,or other type of display screen such as an organic light emitting diode(OLED) display. The display screen can be configured as a touch screen.The touch screen may use capacitive, resistive, or another type of touchscreen technology. An application processor and a graphics processor canbe coupled to internal memory to provide processing and displaycapabilities. A non-volatile memory port can also be used to providedata input/output options to a user. The non-volatile memory port mayalso be used to expand the memory capabilities of the wireless device. Akeyboard may be integrated with the wireless device or wirelesslyconnected to the wireless device to provide additional user input. Avirtual keyboard may also be provided using the touch screen.

Various techniques, or certain aspects or portions thereof, may take theform of program code (i.e., instructions) embodied in tangible media,such as floppy diskettes, compact disc-read-only memory (CD-ROMs), harddrives, non-transitory computer readable storage medium, or any othermachine-readable storage medium wherein, when the program code is loadedinto and executed by a machine, such as a computer, the machine becomesan apparatus for practicing the various techniques. Circuitry caninclude hardware, firmware, program code, executable code, computerinstructions, and/or software. A non-transitory computer readablestorage medium can be a computer readable storage medium that does notinclude signal. In the case of program code execution on programmablecomputers, the computing device may include a processor, a storagemedium readable by the processor (including volatile and non-volatilememory and/or storage elements), at least one input device, and at leastone output device. The volatile and non-volatile memory and/or storageelements may be a random-access memory (RAM), erasable programmable readonly memory (EPROM), flash drive, optical drive, magnetic hard drive,solid state drive, or other medium for storing electronic data. The nodeand wireless device may also include a transceiver module (i.e.,transceiver), a counter module (i.e., counter), a processing module(i.e., processor), and/or a clock module (i.e., clock) or timer module(i.e., timer). One or more programs that may implement or utilize thevarious techniques described herein may use an application programminginterface (API), reusable controls, and the like. Such programs may beimplemented in a high level procedural or object oriented programminglanguage to communicate with a computer system. However, the program(s)may be implemented in assembly or machine language, if desired. In anycase, the language may be a compiled or interpreted language, andcombined with hardware implementations.

It should be understood that many of the functional units described inthis specification have been labeled as modules, in order to moreparticularly emphasize their implementation independence. For example, amodule may be implemented as a hardware circuit comprising customvery-large-scale integration (VLSI) circuits or gate arrays,off-the-shelf semiconductors such as logic chips, transistors, or otherdiscrete components. A module may also be implemented in programmablehardware devices such as field programmable gate arrays, programmablearray logic, programmable logic devices or the like.

Modules may also be implemented in software for execution by varioustypes of processors. An identified module of executable code may, forinstance, comprise one or more physical or logical blocks of computerinstructions, which may, for instance, be organized as an object,procedure, or function. Nevertheless, the executables of an identifiedmodule need not be physically located together, but may comprisedisparate instructions stored in different locations which, when joinedlogically together, comprise the module and achieve the stated purposefor the module.

Indeed, a module of executable code may be a single instruction, or manyinstructions, and may even be distributed over several different codesegments, among different programs, and across several memory devices.Similarly, operational data may be identified and illustrated hereinwithin modules, and may be embodied in any suitable form and organizedwithin any suitable type of data structure. The operational data may becollected as a single data set, or may be distributed over differentlocations including over different storage devices, and may exist, atleast partially, merely as electronic signals on a system or network.The modules may be passive or active, including agents operable toperform desired functions.

Reference throughout this specification to “an example” or “exemplary”means that a particular feature, structure, or characteristic describedin connection with the example is included in at least one embodiment ofthe present invention. Thus, appearances of the phrases “in an example”or the word “exemplary” in various places throughout this specificationare not necessarily all referring to the same embodiment.

As used herein, a plurality of items, structural elements, compositionalelements, and/or materials may be presented in a common list forconvenience. However, these lists should be construed as though eachmember of the list is individually identified as a separate and uniquemember. Thus, no individual member of such list should be construed as ade facto equivalent of any other member of the same list solely based ontheir presentation in a common group without indications to thecontrary. In addition, various embodiments and example of the presentinvention may be referred to herein along with alternatives for thevarious components thereof. It is understood that such embodiments,examples, and alternatives are not to be construed as defactoequivalents of one another, but are to be considered as separate andautonomous representations of the present invention.

Furthermore, the described features, structures, or characteristics maybe combined in any suitable manner in one or more embodiments. In thefollowing description, numerous specific details are provided, such asexamples of layouts, distances, network examples, etc., to provide athorough understanding of embodiments of the invention. One skilled inthe relevant art will recognize, however, that the invention can bepracticed without one or more of the specific details, or with othermethods, components, layouts, etc. In other instances, well-knownstructures, materials, or operations are not shown or described indetail to avoid obscuring aspects of the invention.

While the forgoing examples are illustrative of the principles of thepresent invention in one or more particular applications, it will beapparent to those of ordinary skill in the art that numerousmodifications in form, usage and details of implementation can be madewithout the exercise of inventive faculty, and without departing fromthe principles and concepts of the invention. Accordingly, it is notintended that the invention be limited, except as by the claims setforth below.

What is claimed is:
 1. An apparatus of a user equipment (UE),comprising: memory; and one or more processors configured to: identify,at the UE, a downlink control channel, wherein the downlink controlchannel is identified within a prior specified subframe of n-k that isreceived in time before a subframe n, wherein kεK and K includes a setof M elements {k₀, k₁, . . . k_(M-1)} depending on the subframe n and anuplink/downlink (UL/DL) configuration; determine when the downlinkcontrol channel is an enhanced physical downlink control channel(EPDCCH); and select an enhanced physical uplink control channel (PUCCH)resource allocation for a hybrid automatic retransmissionre-quest-acknowledge (HARQ-ACK) transmission when the downlink controlchannel is the EPDCCH, wherein a PUCCH resource for the subframe n-k isdetermined using an integer m, where k_(m) is a smallest value in K suchthat the UE detects an EPDCCH in a subframe n-k_(m).
 2. The apparatus ofclaim 1, wherein the one or more processors are further configured to:determine when the downlink control channel is a physical downlinkcontrol channel (PDCCH); and select a legacy PUCCH resource allocationfor the HARQ-ACK transmission when the downlink control channel is thePDCCH.
 3. The apparatus of claim 1, wherein the downlink association setindex K is defined in a Table 10.1.3.1-1 in a Third GenerationPartnership Project (3GPP) Long Term Evolution (LTE) standard Release 11Technical Specification (TS) 36.213.
 4. The apparatus of claim 1,wherein for one configured serving cell and the subframe n, with M=1where M is a number of elements in the set Kε{k₀, k₁, . . . k_(M-1)}:the apparatus is further configured to determine the enhanced PUCCHresource n_(PUCCH) ^((1,{tilde over (p)})) for the HARQ-ACK transmissionusing a lowest ECCE index n_(ECCE) of the EPDCCH uses the enhanced PUCCHresource n_(PUCCH) ^((1,{tilde over (p)})) represented by N_(PUCCH)^((1,{tilde over (p)}) ⁰ ⁾=n_(ECCE)+Value for antenna port p₀ andn_(PUCCH) ^((1,{tilde over (p)}) ¹ ⁾=n_(ECCE)+Value+1 for antenna portp₁, where Value is the parameter, n_(ECCE) is the number of the firstECCE used for transmission of the corresponding EPDCCH for the EPDCCHset {tilde over (k)} in subframe n-k_(m) and a corresponding m, wherek_(m) is the smallest value in set K such that UE detects an EPDCCH forthe EPDCCH set {tilde over (k)} in subframe n-k_(m), and antenna port p₁is used when two antenna port transmission is configured; or theapparatus is further configured to determine the legacy PUCCH resourcen_(PUCCH) ^((1,{tilde over (p)})) for a HARQ-ACK transmission using alowest CCE index n_(CCE) of the PDCCH selects a C value out of {0, 1, 2,3} which makes N_(c)≦n_(CCE)<N_(c+1) and uses the legacy PUCCH resourcen_(PUCCH) ^((1,{tilde over (p)})) represented by n_(PUCCH)^((1,{tilde over (p)}) ⁰ ⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾for antenna port p₀ and n_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+1+N_(PUCCH) ⁽¹⁾ for antenna port p₁,where n_(CCE) is a first CCE index number used for transmission of acorresponding PDCCH in subframe n-k_(m) and the corresponding m, wherek_(m) is the smallest value in set K such that UE detects a PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘},N_(RB) ^(DL) is a downlink bandwidth configuration, expressed in unitsof N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in the frequencydomain, expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is astarting PUCCH channel index for a PUCCH region in an uplink subframeand is configured by high layers for each UE, and antenna port p₁ isused when two antenna port transmission is configured.
 5. The apparatusof claim 1, wherein for one configured serving cell and a subframe nwith M>1 where M is the number of elements in the set Kε{k₀, k₁, . . .k_(M-1)} and 0≦i≦M−1: the apparatus is further configured to determinethe enhanced PUCCH resource n_(PUCCH,i) ⁽¹⁾ for the HARQ-ACKtransmission using a lowest ECCE index n_(ECCE,i) is represented byn_(PUCCH,i) ⁽¹⁾=n_(ECCE,i)+Value, where Value is the parameter,n_(ECCE,i) is the number of the first ECCE used for transmission of thecorresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframen-k_(i); or the apparatus is further configured to determine the legacyPUCCH resource n_(PUCCH,i) ⁽¹⁾ for a HARQ-ACK transmission using alowest CCE index n_(CCE,i) is represented by n_(PUCCH,i)^((1)=(M−i−)1)·N_(c)+i+N_(c+1)+n_(CCE,i)+N_(PUCCH) ⁽¹⁾, where c isselected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,i)<N_(c+1), n_(CCE,i)is a first CCE index number used for transmission of a correspondingPDCCH in subframe n-k_(i), N_(c)=max{(0,└[N_(RB) ^(DL)·(N_(sc)^(RB)·c−4)]/36┘}, N_(RB) ^(DL) is a downlink bandwidth configuration,expressed in units of N_(sc) ^(RB), N_(sc) ^(RB) is a resource blocksize in the frequency domain, expressed as a number of subcarriers, andN_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in anuplink subframe and is configured by high layers for each UE.
 6. Theapparatus of claim 1, wherein for at least two configured serving cellsand a subframe n with M≦2 where M is the number of elements in the setKε{k₀, k₁, . . . k_(M-1)}, k_(m)εK on a primary cell, and 0≦j≦A−1 andAε{2, 3, 4}: the apparatus is further configured to determine theenhanced PUCCH resource n_(PUCCH,j) ⁽¹⁾ for the HARQ-ACK transmissionusing a lowest ECCE index n_(ECCE,m) is represented by n_(PUCCH,j)⁽¹⁾=n_(ECCE,m)+Value and n_(PUCCH,j+1) ⁽¹⁾=n_(ECCE,m)+Value+1, whereValue is the parameter, n_(ECCE,m) is the number of the first ECCE usedfor transmission of the corresponding DCI assignment by EPDCCH for theEPDCCH set {tilde over (k)} in subframe n-k_(m) and n_(PUCCH,j+1) ⁽¹⁾ isused for a subframe n and a transmission mode that support up to twotransport block on a serving cell where a corresponding PDSCHtransmission occurs; or the apparatus is further configured to determinethe legacy PUCCH resource n_(PUCCH,j) ⁽¹⁾ for a HARQ-ACK transmissionusing a lowest CCE index n_(CCE,m) is represented by n_(PUCCH,j)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾ and n_(PUCCH,j+1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+1+N_(PUCCH) ⁽¹⁾, where C isselected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m)is a first CCE index number used for transmission of a correspondingPDCCH in subframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)(N_(sc)^(RB)·c−4)]/36┘}, N_(RB) ^(DL) is a downlink bandwidth configurationfrom the primary cell, expressed in units of N_(sc) ^(RB), N_(sc) ^(RB)is a resource block size in the frequency domain, expressed as a numberof subcarriers, and N_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index fora PUCCH region in an uplink subframe and is configured by high layersfor each UE, and n_(PUCCH,j+1) ⁽¹⁾ is used for a subframe n and atransmission mode that support up to two transport block on a servingcell where a corresponding physical downlink shared channel (PDSCH)transmission occurs.
 7. The apparatus of claim 1, wherein for at leasttwo configured serving cells and a subframe n with M>2 where M is thenumber of elements in the set Kε{k₀, k₁, . . . k_(M-1)}, kεK, k_(m)εKfor a primary cell: the apparatus is further configured to determine theenhanced PUCCH resource n_(PUCCH,1) ⁽¹⁾ for the HARQ-ACK transmissionusing a lowest ECCE index n_(ECCE,m) is represented by n_(PUCCH,1)⁽¹⁾=n_(ECCE,m)+Value, where Value is the parameter, n_(ECCE,m) is thenumber of the first ECCE used for transmission of the correspondingEPDCCH for the EPDCCH set {tilde over (k)} in subframe n-k_(m); or theapparatus is further configured to determine the legacy PUCCH resourcen_(PUCCH,1) ⁽¹⁾ for a HARQ-ACK transmission using a lowest CCE indexn_(CCE,m) is represented by n_(PUCCH,1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36 N┘},is a downlink bandwidth configuration from the primary cell, expressedin units of N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in thefrequency domain, expressed as a number of subcarriers, and N_(PUCCH)⁽¹⁾ is a starting PUCCH channel index for a PUCCH region in an uplinksubframe and is configured by high layers for each UE.
 8. The apparatusof claim 1, wherein the UE includes an antenna, a display screen, aspeaker, a microphone, a graphics processor, an application processor,an internal memory, or a non-volatile memory port.
 9. At least onenon-transitory computer readable storage medium having instructionsembodied thereon, the instructions when executed perform the following:identifying, using at least one processor at a user equipment (UE), adownlink control channel, wherein the downlink control channel isidentified within a prior specified subframe of n-k that is received intime before a subframe n, wherein kεK and K includes a set of M elements{k₀, k₁, . . . k_(M-1)} depending on the subframe n and anuplink/downlink (UL/DL) configuration; determining, using the at leastone processor at the UE, when the downlink control channel is anenhanced physical downlink control channel (EPDCCH); and selecting,using the at least one processor at the UE, an enhanced physical uplinkcontrol channel (PUCCH) resource allocation for a hybrid automaticretransmission re-quest-acknowledge (HARQ-ACK) transmission when thedownlink control channel is the EPDCCH, wherein a PUCCH resource for thesubframe n-k is determined using an integer m, where k_(m) is a smallestvalue in K such that the UE detects an EPDCCH in a subframe n-k_(m). 10.The at least one non-transitory computer readable storage medium ofclaim 9, further comprising instructions when executed perform thefollowing: determining when the downlink control channel is a physicaldownlink control channel (PDCCH); and selecting a legacy PUCCH resourceallocation for the HARQ-ACK transmission when the downlink controlchannel is the PDCCH.
 11. The at least one non-transitory computerreadable storage medium of claim 9, wherein the downlink association setindex K is defined in a Table 10.1.3.1-1 in a Third GenerationPartnership Project (3GPP) Long Term Evolution (LTE) standard Release 11Technical Specification (TS) 36.213.
 12. The at least one non-transitorycomputer readable storage medium of claim 9, further comprisinginstructions when executed perform the following: determining theenhanced PUCCH resource using a parameter Value represent byValue=ARO+AP+(m+1)·N_(PUCCH) ^((1,k)) where acknowledgement(ACK)/negative ACK (ACK/NACK) Resource Offset (ARO) is an integer offsetvalue derived from a downlink control information (DCI) in the EPDCCH,an antenna port (AP) is parameter (0, . . . , 3), a N_(PUCCH) ^((1,k))is a UE specific starting offset value for an EPDCCH set {tilde over(k)}.
 13. The at least one non-transitory computer readable storagemedium of claim 9, wherein for one configured serving cell and thesubframe n with M=1: further comprising instructions when executedperform the following: determining the legacy PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) for a HARQ-ACK transmission using the lowest CCEindex n_(CCE) of the PDCCH further comprises selecting a C value out of{0, 1, 2, 3} which makes N_(c)≦n_(CCE)<N_(c+1) and using the legacyPUCCH resource n_(PUCCH) ^((1,{tilde over (p)})) represented byn_(PUCCH) ^((1,{tilde over (p)}) ⁰⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+N_(PUCCH) ⁽¹⁾ for antenna port p₀ andn_(PUCCH) ^((1,{tilde over (p)}) ¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE)+1+N_(PUCCH) ⁽¹⁾ for antenna port p₁,where n_(CCE) is a first CCE index number used for transmission of acorresponding PDCCH in subframe n-k_(m) and the corresponding m, wherek_(m) is the smallest value in set K such that UE detects a PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘},N_(RB) ^(DL) is a downlink bandwidth configuration, expressed in unitsof N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in the frequencydomain, expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is astarting PUCCH channel index for a PUCCH region in an uplink subframeand is configured by high layers for each UE, wherein antenna port p₁ isused when two antenna port transmission is configured; or furthercomprising instructions when executed perform the following: determiningthe enhanced PUCCH resource n_(PUCCH) ^((1,{tilde over (p)})) for theHARQ-ACK transmission using the lowest ECCE index n_(ECCE) of the EPDCCHfurther comprises using the enhanced PUCCH resource n_(PUCCH)^((1,{tilde over (p)})) represented by n_(PUCCH)^((1,{tilde over (p)}))=n_(ECCE)+Value for antenna port p₀ and n_(PUCCH)^((1,{tilde over (p)}) ¹ ⁾=n_(ECCE)+Value+1 for antenna port p₁, wheren_(ECCE) is the number of the first ECCE used for transmission of thecorresponding EPDCCH for the EPDCCH set {tilde over (k)} in subframen-k_(m) and a corresponding m, where k_(m) is the smallest value in setK such that UE detects an EPDCCH for the EPDCCH set {tilde over (k)} insubframe n-k_(m), and antenna port p₁ is used when two antenna porttransmission is configured.
 14. The at least one non-transitory computerreadable storage medium of claim 9, wherein for one configured servingcell and the subframe n with M>1 where 0≦i≦M−1: further comprisinginstructions when executed perform the following: determining the legacyPUCCH resource n_(PUCCH,i) ⁽¹⁾ for a HARQ-ACK transmission using thelowest CCE index n_(CCE,i) is represented by n_(PUCCH,i)⁽¹⁾=(M−m−1)·N_(c)+i·N_(c+1)+n_(CCE,i)+N_(PUCCH) ⁽¹⁾, where c is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,i)<N_(c+1), n_(CCE,i) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(i); N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘},N_(RB) ^(DL) is a downlink bandwidth configuration, expressed in unitsof N_(sc) ^(RB), N_(sc) ^(RB) is a resource block size in the frequencydomain, expressed as a number of subcarriers, and N_(PUCCH) ⁽¹⁾ is astarting PUCCH channel index for a PUCCH region in an uplink subframeand is configured by high layers for each UE; or further comprisinginstructions when executed perform the following: determining theenhanced PUCCH resource n_(PUCCH,i) ⁽¹⁾ for the HARQ-ACK transmissionusing the lowest ECCE index n_(ECCE,i) is represented by n_(PUCCH,i)⁽¹⁾=n_(ECCE,i)+Value, where n_(ECCE,i) is the number of the first ECCEused for transmission of the corresponding EPDCCH for the EPDCCH set{tilde over (k)} in subframe n-k_(i).
 15. The at least onenon-transitory computer readable storage medium of claim 9, wherein forat least two configured serving cells and a subframe n with M≦2 wherek_(m)εK on a primary cell, and 0≦j≦A−1 and Aε{2, 3, 4}: furthercomprising instructions when executed perform the following: determiningthe legacy PUCCH resource n_(PUCCH,j) ⁽¹⁾ for a HARQ-ACK transmissionusing the lowest CCE index n_(CCE,m) is represented by n_(PUCCH,j)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾ and n_(PUCCH,j+1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+1+N_(PUCCH) ⁽¹⁾, where C isselected from {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m)is a first CCE index number used for transmission of a correspondingPDCCH in subframe n-k_(i), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc)^(RB)·c−1)]/36┘}, N_(RB) ^(DL) is a downlink bandwidth configurationfrom the primary cell, expressed in units of N_(sc) ^(RB), N_(sc) ^(RB)is a resource block size in the frequency domain, expressed as a numberof subcarriers, and N_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index fora PUCCH region in an uplink subframe and is configured by high layersfor each UE, wherein n_(PUCCH,j+1) ⁽¹⁾ is used for a subframe n and atransmission mode that support up to two transport block on a servingcell where a corresponding physical downlink shared channel (PDSCH)transmission occurs; or further comprising instructions when executedperform the following: determining the enhanced PUCCH resourcen_(PUCCH,j) ⁽¹⁾ for the HARQ-ACK transmission using the lowest ECCEindex n_(ECCE,m) is represented by n_(PUCCH,j) ⁽¹⁾=n_(ECCE,m)+Value andn_(PUCCH,j+1) ⁽¹⁾=n_(ECCE,m)+Value+1, where n_(ECCE,m) is the number ofthe first ECCE used for transmission of the corresponding DCI assignmentby EPDCCH for the EPDCCH set {tilde over (k)} in subframe n-k_(m), andn_(PUCCH,j+1) ⁽¹⁾ is used for a subframe n and a transmission mode thatsupport up to two transport block on a serving cell where acorresponding PDSCH transmission occurs.
 16. The at least onenon-transitory computer readable storage medium of claim 9, wherein forat least two configured serving cells and a subframe n with M>2 wherekεK, k_(m)εK for a primary cell: further comprising instructions whenexecuted perform the following: determining the legacy PUCCH resourcen_(PUCCH,1) ⁽¹⁾ for a HARQ-ACK transmission using the lowest CCE indexn_(CCE,m) is represented by n_(PUCCH,1)⁽¹⁾=(M−m−1)·N_(c)+m·N_(c+1)+n_(CCE,m)+N_(PUCCH) ⁽¹⁾, where C is selectedfrom {0, 1, 2, 3} such that N_(c)≦n_(CCE,m)<N_(c+1), n_(CCE,m) is afirst CCE index number used for transmission of a corresponding PDCCH insubframe n-k_(m), N_(c)=max{0,└[N_(RB) ^(DL)·(N_(sc) ^(RB)·c−4)]/36┘},N_(RB) ^(DL) is a downlink bandwidth configuration from the primarycell, expressed in units of N_(sc) ^(RB), N_(sc) ^(RB) is a resourceblock size in the frequency domain, expressed as a number ofsubcarriers, and N_(PUCCH) ⁽¹⁾ is a starting PUCCH channel index for aPUCCH region in an uplink subframe and is configured by high layers foreach UE; or further comprising instructions when executed perform thefollowing: determining the enhanced PUCCH resource n_(PUCCH,1) ⁽¹⁾ forthe HARQ-ACK transmission using the lowest ECCE index n_(ECCE,m) isrepresented by n_(PUCCH,1) ⁽¹⁾=n_(ECCE,m)+Value, where n_(ECCE,m) is thenumber of the first ECCE used for transmission of the correspondingEPDCCH for the EPDCCH set {tilde over (k)} in subframe n-k_(m).
 17. Anapparatus of a user equipment (UE) operable to provide physical uplinkcontrol channel (PUCCH) resource allocation in time division duplex(TDD) for a hybrid automatic retransmission re-quest-acknowledge(HARQ-ACK) transmission in a subframe n, the apparatus comprising:memory; and one or more processors configured to: detect a downlinkcontrol channel within a prior specified subframe n-k that is receivedin time before the subframe n, wherein n and k are integers, wherein kεKand K includes a set of M elements {k₀, k₁, . . . k_(M-1)} depending onthe subframe n and an uplink/downlink (UL/DL) configuration; identifywhen the downlink control channel detected within the prior specifiedsubframe n-k is an enhanced physical downlink control channel (EPDCCH);and determine an enhanced PUCCH resource allocation for the HARQ-ACKtransmission using a lowest enhanced CCE (ECCE) index of the EPDCCH whenthe downlink control channel detected in the prior specified subframen-k is the EPDCCH, wherein a PUCCH resource for the subframe n-k isdetermined using an integer m, where k_(m) is a smallest value in K suchthat the UE detects an EPDCCH in a subframe n-k_(m).
 18. The apparatusof claim 17, wherein the one or more processors are further configuredto: identify when the downlink control channel detected within the priorspecified subframe n-k is a physical downlink control channel (PDCCH);determine a legacy PUCCH resource allocation for the HARQ-ACKtransmission using a lowest control channel element (CCE) index of thePDCCH when the downlink control channel detected in the prior specifiedsubframe n-k is the PDCCH.
 19. The apparatus of claim 17, wherein thedownlink association set index K is defined in a Table 10.1.3.1-1 in aThird Generation Partnership Project (3GPP) Long Term Evolution (LTE)standard Release 11 Technical Specification (TS) 36.213.
 20. Theapparatus of claim 17, wherein the one or more processors are furtherconfigured to decode the enhanced PUCCH resource using a parameter Valuerepresent by Value=ARO+AP+(m+1)·N_(PUCCH) ^((1,k)) where acknowledgement(ACK)/negative ACK (ACK/NACK) Resource Offset (ARO) is an integer offsetvalue derived from a downlink control information (DCI) in the EPDCCH,an antenna port (AP) is parameter (0, . . . , 3), a N_(PUCCH) ^((1,k))is a UE specific starting offset value for an EPDCCH set {tilde over(k)}.